diff --git a/g-cloud/requirements.txt b/g-cloud/requirements.txt
index 54cb0b2..30d86ed 100644
--- a/g-cloud/requirements.txt
+++ b/g-cloud/requirements.txt
@@ -127,7 +127,7 @@ libarchive-c==2.8
 lief==0.9.0
 llvmlite==0.31.0
 locket==0.2.0
-lxml==4.5.0
+lxml==4.9.1
 MarkupSafe==1.1.1
 matplotlib==3.1.3
 mccabe==0.6.1